Boiler



BOILER Filed Feb. 24. 1920 3 Sheets-Sheet 1 INVENTOR. L S. JONES.

ATTORNEY.

March 4 1924.

| s. JONES BOILER Filed Feb. 24 1920 3 Sheets-Sheet 2 INVENTOR. L. S. Jo/v.2 s.

A TTORNEY.

L. S. JON ES March 4 1924.

BOILER Filed Feb. 24. 1920 5 Sheets-Sheet 5 INVENTOR L. 5. JONES.

Patented Mar. 4, 1924.

Uhiillfid LONELL S. JONES, OF DENVER, COLORADO.

BOILER.

Application filed February 24, 1920. Serial No. 361,033.

To all whom it may concern,-

Be it known that I, LONELI. S. JoNns, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Boilers, of which the following is a specification.

This invention relates to improvements in boilers and more particularly to boilers of the type used on motor-driven vehicles for the rapid generation of steam for motive power.

It is the primary object of the present invention to provide a boiler of the abovementioned type in which an extensive heating surface is obtained by a novel arrangement of inter connected conduits for the rapid and continuous generation of steam in a space of small dimensions.

Other objects of my invention reside in providing in a boiler of the character described, a novel arrangement of parts to promote the return flow of water carried upwardly with the generated steam, simple and effective means for superheating the steam before it passes-to the engine, and an efficient device for pre'heating the water before it is fed into the water-space of the boiler.

With these and other objects in view, my invention consists of the construction and combinations of parts shown in the accompanying drawings in the several views of which like parts are similarly designated, and in which- Figure 1 is a sectional elevation of a boiler constructed in accordance with the present invention;

Figure 2, a section on the line 2-2, Fig ure 1;

Figure 3, a section taken on the line 3-8, Figure 1, and

Figure 4, a sectional elevation showing a modified construction of the boiler.

Referring more specifically to the drawings, the reference character 2 designatesthe shell or casing of the boiler, made of asbestos-lined metal or other suitable insulating material and having at its upper end an opening 3 for the escape of gases genarated by the combustion of a gaseous fuel in a burner l of appropriate construction placed in the lower portion thereof.

The boiler proper which is mounted inside the shell above the burner, consists of two or more upright columns 5 connected by a plurality of cross pipes 6. Each crosspipe functions as a header for nests of concentric semi-circular tubes 7 which extend at opposite sides thereof and which conjunctively provides within a limited space, a heating surface of great linear extension and of small water-carrying capacity.

lVhile a concentric arrangement and semicircular form of the tubes comprised in each nest, is preferred for reasons of economy and practicability in construction as well as use, I desire it understood that various other forms of tubes may be connected at their ends to the header in similar cooperative relation, within the principle of my invention.

The columns connect at their upper ends with a steam dome 8 preferably composed of a cylindrical box which extends horizontally inside the upper portion of the casing and'which has a multitude of upright flues 9 between its parallel top and bottom surfaces for the passage of gases of combustion to the escape opening 3. The nests of circular tubes with their respective headers arranged one above another in the space between the burner and the dome, extend slantingly between the columns with which they are connected, to produce a continuous upward movement of steam and water at one side of the structure and a continuous downward movement of water at the other side of the same.

The boiler connects at its lowest point, which in the construction shown in the drawings, is the lower end of its longest column, with a conveniently located source of water supply through the medium of a conduit 10 including a coil 12 placed above the steam dome to preheat the water by the heat of the gases of combustion rising through the flues of the dome toward the escape opening in the top of the casing.

The steam generated in the boiler is discharged from the top of the dome through a pipe 13 which is formed into a coil l t placed beneath the dome to superheat and dry the steam before it passes to the engine.

A blow-0E cock 15 at the lower end of the system of conduits constituting the boiler, provides a convenient means for the removal of scale, rust and other solids tending to obstruct the circulatory movement of the water.

In the operation of the boiler the water circulating through the system of interconnected nests of circular tubes is rapidly converted into steam by the heat generated in the burner. The steam passing upwardly in the nests of tubes and their respective headers, rises through the column at their upper ends thereof into the dome while the water carried upwardly with the steam, returns through the opposite column. The water thus constantly circulating through the tubes is rapidly heated and converted into steam, the process being expedited by the heated condition of the feed water as it enters the boiler, caused by its passage through the pre-heating coil above the steam dome.

The steam escapes from the top of the dome in a substantially dry condition owing to its contact with the multitude of fines through which the gases of combustion pass to the escape opening in the top of the boiler casing and the constant return flow of water to the heating tubes as hereinbetore explained, and before passing to the engine the steam is further dried in the superheating coil beneath the steam dome.

In the form of my invention shown in Figure a a column 16 of larger diameter is placed intermediate of the columns 5 and connected with the steam dome at a central point of its bottom surface.

The cross-pipes 6 extend in alined sections from the outer columns to the central one, in communication with the former, and the nests of tubes are connected with the crosspipes as before. The central column coinmunicates at its opposite ends with the lo wer cross pipe and the dome, and. thereby .in creases the water capacity of the boiler.

Having thus described my invention, I desire it understood that the capacity of the boiler may be regulated by varying the num ber of tube nests within the space between the burner and the steam dome, that the number of columns to which the nests are connected may be increased if desired to accelerate the circulation or" the steam and water and that other changes in the con struction and arrangement of the parts of the boiler may be made without departing from the. spirit of my invention as defined in the following claims.

What I claim and desire to secure by Letters-Patent is:

1. A boiler comprising a casing having an opening for the escape of gases, a heater at the lower end of the casing, a steam dome in the upper end of the same, upright columns connected at their upper ends with the steam dome, a connection between the lower portions of the columns and a source of water supply, and heating units positioned one above another in thespace between the heater and the steam dome, and each comprising a pipe connecting the columns, and a series oi curved circulation tubes connected to said pipe at opposite sides thereof.

2. A boiler comprising a casing having an opening for the escape oi gases, a heater at the lower end of the casing, a steam dome in the upper end of the same, upright columns connected at their upper ends with the steam dome at opposite points thereof, a connection between the lower portions of the columns and a source of water supply, and heating units positioned one above another in the space between the heater and the steam dome, and each comprising a transverse pipe connecting the columns and a nest of circulation tubes connectedwith said pipe.

3. A boiler comprising a casing having an opening for the escape of gases, a heater at the lower end of the casing, a steam dome in the upper end of the same, upright columns connected at their upper ends with the steam dome at opposite points thereof, a pipe connecting the columns at their lower ends, a connection between the lower portion of the columns and a source of water supply, a column of larger diameter between the others connecting said pipe with the steam dome, and heating units positioned one above the other in the space between the heater and the dome, and each comprising alined transverse pipes connecting the columns, and a nest of circulation tubes connccted with said pipes.

4. A boiler comprising a casing having an opening for the escape of gases, a heater at the lower end of the casing, a steam dome in the upper end oi the same, having upright fines between its top and bottom for the passage of gases from the burner to the escape opening, upright columns connected at their upper ends with the steam dome, conductive means for feeding water to the lower portions of the columns partially disposed to preheat the water by gases emitted from the flues of the dome, and nests of circulation tubes connected to the columns one above the other in the space between the heater and the dome.

5. A boiler comprising a casing having an opening for the escape of gases, a heater at the lower end of the casing, a steam dome in the upper end of the same, having upright lines between its top and bottom for the passage of gases from the burner to the escape opening, upright columns connected at their upper ends with the steam dome, a connection between the lower portions of the columns and a source of water supply, in-

eluding a coil above the dome and nests of circulation tubes connected to the columns 10 one above the other in the space between the heater and the dome.

In testimony whereof I have afiixed my signature.

LONELL S. JONES. 

